Differential planetary gear shaft mounting device

Abstract

The utility model relates to the technical field of differential assembly, and discloses a differential planetary gear shaft mounting device which comprises a rack, a placement table and a mounting rack, and a differential shell placement area is arranged on the placement table; a planetary gear shaft placing area is arranged on the mounting frame; a pressing rod is arranged on the mounting frame; and the mounting frame can move relative to the rack on a vertical plane. The differential mechanism has the effect of improving the precision of inserting the planetary gear shaft into the differential mechanism shell.

Description

Technical Field

[0001] This application relates to the field of differential assembly technology, and in particular to a differential planetary gear shaft mounting device. Background Technology

[0002] The differential is a key component in a car's transmission system. Its main function is to precisely adjust the speed difference between the left and right wheels when the car is turning, thereby significantly improving the car's turning performance and stability during driving.

[0003] The core structure of a differential includes important components such as the differential housing, planetary gears, and planetary gear shafts. The planetary gears are located inside the differential housing, while the planetary gear shafts are mounted on the differential housing. The planetary gears are fitted onto the planetary gear shafts, which provide support and guidance for the planetary gears, ensuring that the planetary gears can operate stably according to the predetermined motion trajectory and requirements.

[0004] The differential housing has a plug-in hole and a limit hole. The planetary gear shaft is plugged into the plug-in hole and inserted into the differential housing. The planetary gear shaft has a mounting hole. A limit pin is pre-inserted into the limit hole and is plugged into the mounting hole.

[0005] In current differential assembly operations, the usual procedure is for workers to first place the differential housing on the mounting platform, and then install the planetary gears and planetary gear shafts in a predetermined order. After inserting the planetary gear shafts into the differential housing, the limiting pins are inserted into the mounting holes on the planetary gear shafts to complete the assembly of the differential.

[0006] However, during the mass assembly of differentials, workers are prone to fatigue due to prolonged repetitive operations. This may make it difficult for workers to ensure the positional accuracy when inserting the planetary gear shaft into the differential housing, ultimately leading to a decrease in assembly accuracy and affecting the overall assembly quality and performance of the differential. Utility Model Content

[0007] To improve the accuracy of inserting the planetary gear shaft into the differential housing, this application provides a differential planetary gear shaft mounting device.

[0008] The differential planetary gear shaft mounting device provided in this application adopts the following technical solution:

[0009] A differential planetary gear shaft mounting device includes a frame, a placement platform, and a mounting bracket, wherein:

[0010] The placement platform is provided with a differential housing placement area;

[0011] The mounting bracket is provided with a planetary gear shaft placement area;

[0012] The mounting bracket is equipped with a pressure bar;

[0013] The mounting bracket can move relative to the frame in a vertical plane.

[0014] Optionally, the mounting frame includes a first frame and a second frame, wherein:

[0015] The first frame is located below the second frame;

[0016] The first frame is slidably connected to the second frame in the vertical direction via a sliding rod assembly;

[0017] A reset unit is provided between the first frame and the second frame;

[0018] The second frame is slidably engaged with the frame in the horizontal direction via a slide rail;

[0019] A locking unit is provided between the second frame and the slide rail.

[0020] Optionally, the first frame is provided with a push column;

[0021] The push column moves horizontally with the frame via a horizontal drive unit;

[0022] The push column is detachably connected to the planetary gear shaft.

[0023] Optionally, the push column is provided with a vacuum channel communicating with a vacuum generator;

[0024] The opening of the vacuum channel is located on the contact surface between the push column and the planetary gear shaft.

[0025] Optionally, the first frame is provided with a first through hole;

[0026] Both the push column and the planetary gear shaft are inserted into the first through hole.

[0027] Optionally, a second through hole is provided on the wall of the first through hole;

[0028] A plug-in rod is inserted into the second through hole;

[0029] The plug rod is inserted into the mounting hole on the planetary gear shaft.

[0030] Optionally, the end of the plug rod is hemispherical, and the diameter of the hemisphere is smaller than the diameter of the mounting hole of the planetary gear shaft.

[0031] Optionally, the pressure bar is mounted on the second frame;

[0032] The frame moves vertically along the machine frame via a first vertically driven unit.

[0033] Optionally, the first frame is provided with a guide groove;

[0034] The pressure rod is inserted into the guide groove.

[0035] Optionally, a positioning slot is provided on the second frame;

[0036] The slide rail is equipped with a telescopic ball;

[0037] The telescopic ball and the positioning groove are connected and fitted together.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. The planetary gear shaft is initially positioned through the first through hole on the first frame. Then, a connector rod, which automatically falls into the planetary gear shaft mounting hole under gravity, performs circumferential positioning. Finally, the vacuum adsorption function at the end of the push post achieves precise pickup and fixation of the planetary gear shaft. This multi-stage positioning mechanism (first through hole limiting, connector rod limiting, vacuum adsorption) significantly improves the positioning accuracy of the planetary gear shaft before installation, ensuring accurate alignment of its axis and mounting hole position. This lays the foundation for subsequent precise insertion into the differential housing's connector hole and press-fitting of the limiting pin, thereby enhancing the overall installation reliability and the stability of planetary gear operation.

[0040] 2. Operators only need to operate the handle on the first frame to move it vertically. This, in turn, moves the second frame horizontally along the slide rail to a specific position defined by the stop bar. At this point, the locking unit (such as a guide rail clamp) automatically secures the second frame. After inserting the planetary gear shaft, releasing the handle allows the first frame to automatically return to its original position under the action of the reset unit (such as a spring balancer), preventing obstruction of the subsequent transport of the differential housing. This design simplifies what could have been a complex multi-directional adjustment into a single operation (pulling / releasing the handle), significantly reducing operator workload and complexity, and improving efficiency.

[0041] 3. When the second frame moves to a specific position (ensuring this via a stop bar and locking unit), its pressure bar is precisely aligned above the pre-installed limit pin on the differential housing. Simultaneously, the guide groove on the first frame provides precise guidance for the vertical movement of the pressure bar. Once the mounting hole of the planetary gear shaft is coaxial with the limit hole, the vertical drive unit (e.g., a cylinder) drives the pressure bar to precisely press down along the guide groove, smoothly and vertically pressing the limit pin into the mounting hole of the planetary gear shaft to complete the final limit. The constraint of the guide groove and the precise alignment mechanism effectively prevent misalignment during the pressing process, reducing the risk of damage to parts due to misalignment and ensuring the accuracy and operational safety of the pressing process. Attached Figure Description

[0042] Figure 1 This is a schematic diagram illustrating the differential structure in the embodiments of this application.

[0043] Figure 2 This is a schematic diagram illustrating the planetary gear shaft structure in an embodiment of this application.

[0044] Figure 3 This is a schematic diagram of the overall structure of the application embodiment.

[0045] Figure 4 This is a schematic diagram illustrating the relative positions of the first frame and the second frame in the application embodiment.

[0046] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Frame; 11. Slide rail; 12. Locking unit; 13. Blocking bar; 2. Placement platform; 3. Mounting bracket; 31. First frame; 32. Second frame; 33. Slide bar assembly; 34. First through hole; 35. Second through hole; 36. Connecting rod; 37. Guide groove; 4. Pressure rod; 5. Push column; 6. Reset unit; 7. Differential housing; 71. Connecting hole; 72. Limiting hole; 8. Planetary gear; 9. Planetary gear shaft; 91. Mounting hole. Detailed Implementation

[0049] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0050] This application discloses a differential planetary gear shaft mounting device.

[0051] The differential includes a differential housing 7, planetary gears 8, and planetary gear shafts 9. The planetary gears 8 are located inside the differential housing 7, while the planetary gear shafts 9 are mounted on the differential housing 7. The planetary gears 8 are mounted on the planetary gear shafts 9, which provide support and guidance for the planetary gears 8, ensuring that the planetary gears 8 can operate stably according to the predetermined motion trajectory and requirements.

[0052] The differential housing 7 is provided with a plug hole 71 and a limiting hole 72. The planetary gear shaft 9 is plugged into the plug hole 71 and inserted into the differential housing 7 through the plug hole 71. The planetary gear shaft 9 is provided with a mounting hole 91. A limiting pin is pre-inserted into the limiting hole 72, and the limiting pin is plugged into the mounting hole 91.

[0053] A differential planetary gear shaft mounting device includes a frame 1, a placement platform 2, and a mounting bracket 3. The placement platform 2 has a placement area for the differential housing 7, and the mounting bracket 3 has a placement area for the planetary gear shaft 9. The mounting bracket 3 is equipped with a pressure rod 4, and the mounting bracket 3 can move relative to the frame 1 in a vertical plane.

[0054] The mounting platform 2 is fixed on the frame 1. After the planetary gear 8 is placed inside the differential housing 7, the differential housing 7 is placed in the differential housing 7 placement area on the mounting platform 2, and the planetary gear shaft 9 is placed in the planetary gear shaft 9 placement area on the mounting bracket 3. The mounting bracket 3 is moved so that the planetary gear shaft 9 and the insertion hole 71 on the differential housing 7 are aligned. Then, the pressure rod 4 is moved downward to press the limiting pin, which is pre-installed in the limiting hole 72 of the differential housing 7, into the mounting hole 91 of the planetary gear shaft 9, thereby further limiting the planetary gear shaft 9, thus completing the installation of the differential.

[0055] The mounting frame 3 includes a first frame 31 and a second frame 32. The first frame 31 is located below the second frame 32. The first frame 31 slides vertically with the second frame 32 through a slide rod assembly 33. A reset unit 6 is provided between the first frame 31 and the second frame 32. The second frame 32 slides horizontally with the frame 1 through a slide rail 11. A locking unit 12 is provided between the second frame 32 and the slide rail 11.

[0056] The first frame 31 is equipped with a handle. When it is necessary to move the first frame 31 toward the differential housing 7, the operator pulls the first frame 31 with the handle to move it vertically, and drives the second frame 32 to move on the slide rail 11 through the slide rod assembly 33 on the first frame 31.

[0057] To minimize the possibility of horizontal movement of the second frame 32 during differential assembly, the second frame 32 is fixed to the slide rail 11 by the locking unit 12 after sliding to a specific position on the slide rail 11. In this embodiment, the locking unit 12 is a guide rail clamp.

[0058] To ensure the accuracy of the movement of the second frame 32 on the slide rail 11, a stop bar 13 is provided on the slide rail 11. After the second frame 32 contacts the stop bar 13, the locking unit 12 fixes the second frame 32 on the slide rail 11.

[0059] The reset unit 6 is a spring balancer, which is fixedly installed on the second frame 32. The slide bar assembly 33 slides in the vertical direction with the second frame 32, and the working end of the spring balancer is fixedly connected to the top end of the slide bar assembly 33.

[0060] When the first frame 31 is in the initial state, the first frame 31 is close to the second frame 32 in the vertical direction. When the differential housing 7 is transported on the frame 1, the possibility of the first frame 31 obstructing the movement of the differential housing 7 is reduced.

[0061] When the first frame 31 needs to be reset, the staff releases the handle on the first frame 31, and the first frame 31 moves upward through the slide bar group 33 under the action of the spring balancer.

[0062] The first frame 31 is provided with a push column 5, which moves horizontally with the frame 1 through a horizontal drive unit. The push column 5 is detachably connected to the planetary gear shaft 9.

[0063] After mounting the planetary gear shaft 9 onto the push column 5, move the first frame 31 to a position close to the differential housing 7. Then, via the horizontal drive unit, the push column 5 inserts the planetary gear shaft 9 into the insertion hole 71 on the differential housing 7. After the planetary gear shaft 9 is installed, disconnect the push column 5 and the planetary gear shaft 9 and reset. In this embodiment, the horizontal drive unit is a cylinder.

[0064] The push column 5 has a vacuum channel inside that communicates with the vacuum generator, and the opening of the vacuum channel is located on the contact surface between the push column 5 and the planetary gear shaft 9.

[0065] When mounting the planetary gear shaft 9 onto the push column 5, the axes of the planetary gear shaft 9 and the push column 5 are aligned, and the ends of the planetary gear shaft 9 and the push column 5 are brought into contact. Then, a negative pressure environment is created between the contact surfaces of the planetary gear shaft 9 and the push column 5 by a vacuum generator, so that the planetary gear shaft 9 is adsorbed onto the end of the push column 5.

[0066] The first frame 31 is provided with a first through hole 34, and the push column 5 and the planetary gear shaft 9 are both inserted into the first through hole 34. The wall of the first through hole 34 is provided with a second through hole 35, and a plug rod 36 is inserted into the second through hole 35. The plug rod 36 is inserted into the mounting hole 91 on the planetary gear shaft 9.

[0067] Before the planetary gear shaft 9 is installed on the push post 5, the planetary gear shaft 9 is inserted into the first through hole 34 to initially position it. Then, the planetary gear shaft 9 is rotated around its own axis, so that the axis of the mounting hole 91 on the planetary gear shaft 9 is vertical, causing the insertion rod 36 to fall into the mounting hole 91 of the planetary gear shaft 9 under its own weight, thereby further positioning the planetary gear shaft 9. Then, the push post 5 is placed in the first through hole 34 and attracts the planetary gear shaft 9, completing the positioning and installation of the planetary gear shaft 9 on the push post 5.

[0068] The end of the connector rod 36 is hemispherical, and the diameter of the hemisphere is smaller than the diameter of the mounting hole 91 of the planetary gear shaft 9. When the planetary gear shaft 9 is moved by the push post 5, since the diameter of the hemisphere on the connector rod 36 is smaller than the diameter of the mounting hole 91 on the planetary gear shaft 9, it is convenient to push the connector rod 36 out of the mounting hole 91 of the planetary gear shaft 9 during the movement of the planetary gear shaft 9, thereby releasing the connector rod 36 from limiting the planetary gear shaft 9.

[0069] The pressure rod 4 is mounted on the second frame 32, which moves vertically along with the frame 1 via a vertical drive unit. The specific position of the second frame 32 on the slide rail 11 is when the pressure rod 4 is positioned directly above the limit pin. After the pressure rod 4 moves directly above the limit pin, the second frame 32 is fixed to the slide rail 11 by the locking unit 12.

[0070] After the mounting hole 91 and the limiting hole 72 on the planetary gear shaft 9 are coaxial, the pressure rod 4 is moved vertically by the vertical drive unit to press the limiting pin into the mounting hole 91 of the planetary gear shaft 9. In this embodiment, the vertical drive unit is a cylinder.

[0071] The first frame 31 is provided with a guide groove 37, and the pressure rod 4 is inserted into the guide groove 37. During the vertical movement of the pressure rod 4, the inner wall of the guide groove 37 guides the pressure rod 4, improving the accuracy of the movement direction of the pressure rod 4.

[0072] The second frame 32 is provided with a positioning groove, and the slide rail 11 is provided with a telescopic ball, which is inserted into the positioning groove. The slide rail 11 is provided with a positioning seat, which has a cavity inside and an opening at the bottom of the cavity. The telescopic ball is placed inside the cavity, and the diameter of the telescopic ball is larger than the opening on the cavity.

[0073] When the second frame 32 moves to a specific position, the telescopic ball on the slide rail 11 is placed in the positioning groove, making it easy for staff to confirm that the second frame 32 has moved to the specific position.

[0074] The inner wall of the positioning groove is curved, which makes it easier for the inner wall of the positioning groove to compress the telescopic ball when the second frame 32 is moved, thus reducing the possibility that the telescopic ball will obstruct the movement of the second frame 32.

[0075] The implementation principle of the differential planetary gear shaft mounting device in this application embodiment is as follows: After placing the planetary gear 8 inside the differential housing 7, the differential housing 7 is placed in the differential housing 7 placement area on the placement platform 2, and the planetary gear shaft 9 is placed in the planetary gear shaft 9 placement area on the mounting bracket 3. By inserting the planetary gear shaft 9 into the first through hole 34 on the first bracket 31 and rotating it to make the axis of the mounting hole 91 on the planetary gear shaft 9 vertical, the insertion rod 36 falls into the mounting hole 91 under the action of gravity for positioning. Then, the push column 5 is used to attract the planetary gear shaft 9 through the vacuum generator. Then, the operation... Personnel pull the handle on the first frame 31 to move the first frame 31 vertically, which in turn moves the second frame 32 horizontally to a specific position via the slide rail 11 (at this time, the blocking rod 13 contacts the second frame 32, and the locking unit 12 fixes the second frame 32). The push column 5 moves horizontally via the horizontal drive unit to insert the planetary gear shaft 9 into the insertion hole 71 on the differential housing 7. After disconnecting the push column 5, the pressure rod 4 moves downward via the vertical drive unit to press the limiting pin, which is pre-installed at the limiting hole 72 of the differential housing 7, into the mounting hole 91 of the planetary gear shaft 9, thus completing the differential installation.

[0076] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A differential planetary gear shaft mounting arrangement characterised in that: Includes racks, placement platforms, and mounting brackets, among which: The placement platform is provided with a differential housing placement area; The mounting bracket is provided with a planetary gear shaft placement area; The mounting bracket is equipped with a pressure bar; The mounting bracket can move relative to the frame in a vertical plane.

2. The differential planetary gear shaft mounting device according to claim 1, characterized in that: The mounting frame includes a first frame and a second frame, wherein: The first frame is located below the second frame; The first frame is slidably connected to the second frame in the vertical direction via a sliding rod assembly; A reset unit is provided between the first frame and the second frame; The second frame is slidably engaged with the frame in the horizontal direction via a slide rail; A locking unit is provided between the second frame and the slide rail.

3. A differential planetary gear shaft mounting device according to claim 2, characterized in that: The first frame is equipped with a push column; The push column moves horizontally with the frame via a horizontal drive unit; The push column is detachably connected to the planetary gear shaft.

4. A differential planetary gear shaft mounting device according to claim 3, characterized in that: The push column has a vacuum channel inside that communicates with a vacuum generator; The opening of the vacuum channel is located on the contact surface between the push column and the planetary gear shaft.

5. A differential planetary gear shaft mounting device according to claim 3, characterized in that: The first frame is provided with a first through hole; Both the push column and the planetary gear shaft are inserted into the first through hole.

6. A differential planetary gear shaft mounting device according to claim 5, characterized in that: A second through hole is provided on the wall of the first through hole; A plug-in rod is inserted into the second through hole; The plug rod is inserted into the mounting hole on the planetary gear shaft.

7. A differential planetary gear shaft mounting device according to claim 6, characterized in that: The end of the plug rod is hemispherical, and the diameter of the hemisphere is smaller than the diameter of the mounting hole of the planetary gear shaft.

8. A differential planetary gear shaft mounting device according to claim 2, characterized in that: The pressure bar is mounted on the second frame; The frame moves vertically along the machine frame via a first vertically driven unit.

9. A differential planetary gear shaft mounting device according to claim 8, characterized in that: The first frame is provided with guide grooves; The pressure rod is inserted into the guide groove.

10. A differential planetary gear shaft mounting device according to claim 2, characterized in that: The second frame has a positioning slot; The slide rail is equipped with a telescopic ball; The telescopic ball and the positioning groove are connected and fitted together.

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